Been looking and looking, can't seem to find the open inventory event anywhere. Could someone help me please? Basically what I need is something like, if inventory open, do this, blah blah code here, that sort of thing.

At least for most inventories you can use the Events PlayerInteract & EntityInteract (Minecart with Chest for example).

 

Do you think this would work?

 

	while (this.gameSettings.keyBindInventory.isPressed())
    {
        //Do something here
    }